Sony DNW-A100 Maintenance Manual page 379

Installation
4. Set the SCSI's ID
Insert the short plug to the short pins of two hard
disk drives corresponding to each SCSI's ID
number (0 or 1) as shown in the figure.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
SCSI ID=0
Without shorting plug
Set the SCSI's ID
5-31-3. Hard Disk Drive Replacement
SCSI ID=0
6 mm
SCSI ID=1
SCSI ID=1
Shorting plug
Short the shorting
pin No.1 to the No.2
5-195